head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is execution, and it is a single point.

Optimization · Pure Optimization
A tower-defense action RPG hybrid about defending magical portals from enemy waves.

Optimization · Pure Optimization
The poppy direct sequel to FFX where Yuna's trio swaps job dresspheres mid-battle across Spira.
Deathtrap leans Optimization (Pure Optimization); Final Fantasy X-2 leans Optimization (Pure Optimization).
Deathtrap leans a little harder on execution, though the gap is small.
Deathtrap
Some real-time aiming in tower placement and hero control.
Final Fantasy X-2
Active Time Battle rewards quick menuing slightly.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Deathtrap
Enemy waves are scripted or randomized, not adaptive.
Final Fantasy X-2
All enemies follow scripted AI routines.
Deathtrap leans a little harder on variance, though the gap is small.
Deathtrap
Wave composition and loot rolls add unpredictability.
Final Fantasy X-2
Drop rates and unknown encounters until mapped.
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Deathtrap
Tower and build optimization is the deeply solvable core.
Final Fantasy X-2
Dressphere builds, garment grids, and completion routing dominate.
A matching score does not mean a matching test. Two games can both sit at 10 on execution and demand completely different things of you - which is why the reasoning above matters more than the number beside it.